Anti-blocking CRRT blood purification pipeline

Abstract

The invention belongs to the technical field of medical equipment, and particularly relates to an anti-blocking CRRT blood purification pipeline which comprises a pipeline body, a branch pipe is communicated to the pipeline body, a fixing plate is arranged at the end, away from the pipeline body, of the branch pipe, a filter screen is arranged in the pipeline body, an anti-falling screen is arranged on the filter screen, and a pull rod is fixedly connected to the filter screen. A through hole I allowing the pull rod to penetrate through is formed in the fixed plate, a movable plate is fixedly connected to the end, away from the filter screen, of the pull rod, a soft film is arranged between the movable plate and the fixed plate, and a sealing cavity is formed among the soft film, the movable plate and the fixed plate; a locking assembly used for locking the movable plate is arranged between the movable plate and the fixed plate, and after the locking assembly unlocks the movable plate, the movable plate can move in the radial direction of the pipeline body relative to the fixed plate. The blood clots are intercepted through the filter screen and transferred into the branch pipe, so that the blood clots are effectively prevented from blocking the blood purification pipeline.

Description

Technical Field

[0001] The invention belongs to the technical field of medical equipment, and in particular relates to an anti-blocking CRRT blood purification pipeline. Background Art

[0002] CRRT (continuous renal replacement therapy) is a continuous renal replacement therapy, which aims to remove excess water, metabolic waste and toxins from the body, correct water and electrolyte disorders, ensure nutritional support, promote renal function recovery and remove various cytokines and inflammatory mediators. It can be used for the treatment of various acute and chronic renal failure with unstable cardiovascular function, high catabolism or cerebral edema, as well as multiple organ dysfunction syndrome, acute respiratory distress syndrome, crush syndrome, acute necrotizing pancreatitis, chronic heart failure, hepatic encephalopathy, drug and toxic poisoning, etc.

[0003] Clinically, after the patient's blood enters the blood purification pipeline, it passes through the filter to remove metabolic waste and poisons in the blood, corrects the water and electrolyte disorder, and then returns to the patient's body through the blood purification pipeline. In this process, heparin is added to the blood to prevent blood coagulation, but due to individual differences, the amount of heparin required varies. If the amount of heparin added is too little, it will cause blood coagulation and block the pipeline, affecting the blood purification process and even endangering the patient's health. Therefore, it is necessary to design a blood purification pipeline with anti-blockage function. Summary of the invention

[0004] The present invention is intended to provide a blockage-proof CRRT blood purification pipeline to solve the problem of blockage of the blood purification pipeline.

[0005] In order to achieve the above-mentioned purpose, the scheme of the present invention is: a blockage-proof CRRT blood purification pipeline, including a pipeline main body, a branch pipe is connected to the pipeline main body, a fixed plate is provided at one end of the branch pipe away from the pipeline main body, a filter screen is provided in the pipeline main body, an anti-falling net is provided on the filter screen, a pull rod is fixedly connected to the filter screen, a through hole I for the pull rod to pass through is provided on the fixed plate, a movable plate is fixedly connected to one end of the pull rod away from the filter screen, a soft membrane is provided between the movable plate and the fixed plate, one end of the soft membrane is fixedly connected to the movable plate, and the other end of the soft membrane is fixedly connected to the fixed plate, and a sealed cavity is formed between the soft membrane, the movable plate and the fixed plate; a locking assembly for locking the movable plate is provided between the movable plate and the fixed plate, and after the locking assembly releases the lock on the movable plate, the movable plate can move relative to the fixed plate along the radial direction of the pipeline main body.

[0006] The working principle and beneficial effects of this solution are as follows: in this solution, when the blood in the pipeline main body coagulates and forms a blood clot, the blood clot is intercepted by the filter to prevent the blood clot from flowing with the blood in the pipeline main body. Moreover, after the medical staff releases the lock of the movable plate by the locking assembly, they can pull the movable plate outward to pull the filter into the branch pipe, and then transfer the blood clot into the branch pipe; at the same time, the anti-fall net on the filter is against the inner wall of the branch pipe to prevent the blood clot from falling back into the pipeline main body. In this way, this solution can both intercept blood clots and transfer blood clots into the branch pipe, thereby preventing blood clots from blocking the pipeline main body and ensuring smooth blood flow in the pipeline main body.

[0007] Moreover, the soft membrane design in this solution can not only provide movement capacity for the moving plate, but also effectively isolate the blood to avoid blood exposure.

[0008] Optionally, the locking assembly includes a threaded limiting rod and a locking nut, the threaded limiting rod is fixedly connected to the movable plate, the locking nut is threadedly connected to the threaded limiting rod, and a through hole II for the threaded limiting rod to pass through is opened on the fixed plate.

[0009] In this solution, the locking nut is rotated to change the position of the locking nut on the threaded limiting rod, so that the restriction on the movable plate can be released, thereby pulling the filter screen into the branch pipe through the movable plate.

[0010] Optionally, the locking assembly includes a ball screw pair, a mounting plate and a C-clamp, the mounting plate is perpendicular to the fixed plate, the screw of the ball screw pair is rotatably mounted on the mounting plate, the nut of the ball screw pair is vertically slidably mounted on the mounting plate, the C-clamp is fixedly connected to the nut of the ball screw pair, and the C-clamp is used to clamp the movable plate.

[0011] In this solution, the lead screw of the ball screw pair is rotated, and the nut of the ball screw pair moves along the axial direction of the lead screw, thereby moving the C-type clamp and the movable plate, and then pulling the filter into the branch pipe.

[0012] Optionally, the through hole I is a strip hole, a pressure sensor is provided between the C-shaped clamp and the movable plate, the pressure sensor is electrically connected to a controller, and the controller is electrically connected to an alarm.

[0013] In this solution, when the blood clot in the main body of the pipeline is intercepted by the filter, the blood clot blocks some of the filter holes of the filter, causing the blood flow impact on the filter to increase. The impact is transmitted to the movable plate through the pull rod, the inclination tendency of the movable plate increases, and the pressure signal detected by the pressure sensor increases. The controller controls the alarm to work, thereby alerting medical staff that the filter has intercepted the blood clot and that the screw rod needs to be turned to pull the blood clot into the branch pipe.

[0014] Optionally, the locking assembly further comprises a driving motor for driving the screw of the ball screw pair to rotate, the driving motor is fixedly mounted on the mounting plate, and the controller controls the driving motor to operate according to a signal transmitted by the pressure sensor.

[0015] In this solution, a drive motor is used to drive the screw of the ball screw pair to rotate, and the drive motor is controlled by a controller, so that the movable plate can be automatically moved, so that the filter and blood clots can be pulled into the branch pipe in time and the workload of medical staff can be reduced.

[0016] Optionally, the controller is electrically connected to a display screen, and the display screen is used to display pressure data detected by the pressure sensor.

[0017] In this solution, the pressure signal detected by the pressure sensor is related to the blood viscosity in the main body of the pipeline. The overall relationship is: the greater the blood viscosity in the main body of the pipeline, the greater the pressure signal detected by the pressure sensor. Medical staff can understand the blood viscosity in the main body of the pipeline through the pressure data on the display screen, thereby determining the amount of heparin to be added to avoid adding too much or too little heparin.

[0018] Optionally, the mounting plate can be detachably mounted on the fixing plate.

[0019] In this solution, the mounting plate is detachable. Compared with the mounting plate being fixed to the fixing plate, this solution can reuse the locking assembly and reduce material waste.

[0020] Optionally, a mounting ear plate is provided at the end of the mounting plate, and mounting holes are provided on the mounting ear plate and the fixing plate.

[0021] In this solution, the mounting plate can be installed by passing the bolt through the mounting hole and engaging with the nut thread.

[0022] Optionally, a containing cavity opposite to the branch pipe is provided on the pipeline main body, the filter screen extends into the containing cavity, the number of anti-falling nets on the filter screen is more than two, and the more than two anti-falling nets are distributed on the filter screen along the axial direction of the branch pipe.

[0023] In this solution, after the moving plate moves, the filter part originally located in the accommodating cavity moves into the pipeline body to continue intercepting the blood clots in the pipeline body. In this way, this solution can intercept blood clots in the pipeline body more than twice, increasing the number of anti-blocking times.

[0024] Optionally, there are two anti-falling nets, and the distance between the two anti-falling nets is the radial height of the pipeline body.

[0025] In this solution, after the filter moves, the anti-fall net located at the upper position abuts against the inner wall of the branch pipe to prevent the blood clot from falling back into the main body of the pipeline; after the blood clot is intercepted on the filter again, the filter moves again, and the anti-fall net located at the lower position abuts against the inner wall of the branch pipe to prevent the blood clot from falling back into the main body of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of an anti-blocking CRRT blood purification pipeline in Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure after the filter screen enters the branch pipe in the first embodiment of the present invention;

[0028] Figure 3 This is a schematic structural diagram of an anti-blocking CRRT blood purification pipeline in Embodiment 2 of the present invention;

[0029] Figure 4 for Figure 3 A is an enlarged schematic diagram;

[0030] Figure 5 This is a schematic diagram of the structure after the filter screen enters the branch pipe in the second embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of an anti-blocking CRRT blood purification pipeline in Embodiment 3 of the present invention;

[0032] Figure 7 This is a schematic diagram of the structure after the upper part of the filter screen enters the branch pipe in the third embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following is further described in detail through specific implementation methods:

[0034] The marks in the drawings of the specification include: pipeline main body 1, accommodating chamber 110, branch pipe 2, fixing plate 3, strip hole 301, filter screen 4, anti-fall net 5, pull rod 6, movable plate 7, soft membrane 8, sealing chamber 9, threaded limit rod 10, locking nut 11, ball screw pair 12, screw 121, nut 122, mounting plate 13, mounting ear plate 131, C-type clamp 14, drive motor 15, bolt 16, bearing 17, T-type slider 18, pressure sensor 19, controller 20, alarm 21, display screen 22.

[0035] Embodiment 1

[0036] This embodiment is basically Figure 1 ( Figure 1The arrow in the figure indicates the direction of blood flow): a blockage-proof CRRT blood purification pipeline, comprising a pipeline body 1, a branch pipe 2 is connected to the pipeline body 1, and a fixed plate 3 is integrally formed at one end of the branch pipe 2 away from the pipeline body 1; a filter screen 4 is arranged inside the pipeline body 1, and an anti-falling net 5 is welded on the filter screen 4, and the anti-falling net 5 is located on the side of the filter screen 4 facing the blood source; a pull rod 6 is welded on the top of the filter screen 4, and a through hole I for the pull rod 6 to pass through is opened on the fixed plate 3, and a movable plate 7 is fixedly connected to the end of the pull rod 6 away from the filter screen 4. A soft film 8 and a locking assembly for locking the movable plate 7 are arranged between the movable plate 7 and the fixed plate 3, one end of the soft film 8 is welded to the movable plate 7, and the other end of the soft film 8 is welded to the fixed plate 3, and a sealed cavity 9 is formed between the soft film 8, the movable plate 7 and the fixed plate 3; the soft film 8 is made of medical silicone. After the locking assembly releases the locking of the movable plate 7, the movable plate 7 can move relative to the fixed plate 3 along the radial direction of the pipeline body 1. The locking assembly in this embodiment includes a threaded limiting rod 10 and a locking nut 11. The threaded limiting rod 10 is fixedly connected to the movable plate 7. The locking nut 11 is threadedly connected to the threaded limiting rod 10. A through hole II is provided on the fixed plate 3 for the threaded limiting rod 10 to pass through.

[0037] During specific use, when a blood clot appears in the pipeline body 1, the blood clot flows with the blood to the filter 4, and the blood clot is intercepted by the filter 4 to prevent the blood clot from accumulating in the pipeline body 1 with the blood flow. Subsequently, the medical staff rotates the locking nut 11 located below the fixed plate 3 to move the locking nut 11 downward, and then pulls the movable plate 7 upward. At this time, the pull rod 6 and the filter 4 enter the branch pipe 2 as the movable plate 7 moves upward, thereby realizing the transfer of the blood clot and allowing the blood clot to enter the branch pipe 2. Moreover, at this time, the left end of the anti-fall net 5 abuts against the inner wall of the branch pipe 2, separating the space where the blood clot is located in the branch pipe 2 from the pipeline body 1. Figure 2 As shown, the blood clot is prevented from falling back into the pipeline body 1. In summary, in this embodiment, the blood clot is intercepted and transferred to the branch tube 2, thereby preventing the blood clot from blocking the pipeline body 1 and ensuring smooth blood flow in the pipeline body 1.

[0038] In addition, during the upward movement of the movable plate 7, the soft film 8 stretches to provide movement for the movable plate 7. Although blood will flow into the sealing cavity 9 during this process, the blood will not contact the outside world, and blood exposure can be effectively avoided.

[0039] Embodiment 2

[0040] The difference between this embodiment and the first embodiment is that the locking assembly in this embodiment is different from the locking assembly in the first embodiment. Figure 3As shown, the locking assembly in this embodiment includes a ball screw pair 12, a mounting plate 13, a C-type clamp 14, and a driving motor 15 for driving the screw rod 121 of the ball screw pair 12 to rotate. The mounting plate 13 is detachably mounted on the fixing plate 3. Specifically, a mounting ear plate 131 is integrally formed at the bottom end of the mounting plate 13. The mounting ear plate 131 and the fixing plate 3 are both provided with mounting holes. The bolt 16 is passed through the mounting hole and then matched with the common nut thread, so as to fix the mounting plate 13.

[0041] The driving motor 15 is fixedly mounted on the mounting plate 13. The screw rod 121 of the ball screw pair 12 is rotatably mounted on the mounting plate 13 through the bearing 17. The nut 122 of the ball screw pair 12 is vertically slidably mounted on the mounting plate 13. Specifically, a T-shaped slider 18 is welded on the nut 122 of the ball screw pair 12, and a T-shaped slide groove for the T-shaped slider 18 to slide is provided on the mounting plate 13. The C-shaped clamp 14 is welded to the nut 122 of the ball screw pair 12. The C-shaped clamp 14 is used to clamp the left end of the moving plate 7, and is combined with the C-shaped clamp 14 to clamp the left end of the moving plate 7. Figure 4 As shown, a pressure sensor 19 is provided between the C-type clamp 14 and the movable plate 7, and the pressure sensor 19 is electrically connected to a controller 20, and the controller 20 is electrically connected to an alarm 21 and a display screen 22; the controller 20 controls the alarm 21 and the driving motor 15 to work according to the signal transmitted by the pressure sensor 19, and the display screen 22 is used to display the pressure data detected by the pressure sensor 19. In this embodiment, the pressure sensor 19 is a thin film pressure sensor, which is fixedly attached to the inner wall of the bottom end of the C-type clamp 14. In addition, the through hole I on the fixed plate 3 is a strip hole 301.

[0042] When used specifically, when the blood in the pipeline body 1 flows through the filter 4, the filter 4 is subjected to an impact force in the axial direction of the pipeline body 1 due to the certain viscosity of the blood, and the impact force on the filter 4 is transmitted to the movable plate 7 through the pull rod 6. In addition, the through hole I on the fixed plate 3 is a strip hole 301, and the left side of the pull rod 6 is not supported. Therefore, the force on the movable plate 7 is unbalanced, and the movable plate 7 has a movement trend of being lower on the left and higher on the right. The pressure applied by the movable plate 7 to the C-type clamp 14 will change with the movement trend of the movable plate 7. Specifically, when the viscosity of the blood increases, this movement trend increases accordingly, the degree of unbalanced force on the movable plate 7 is aggravated, and the pressure on the C-type clamp 14 increases; when the viscosity of the blood decreases, this movement trend decreases accordingly, the unbalanced force on the movable plate 7 is alleviated, and the pressure on the C-type clamp 14 is reduced.

[0043] Therefore, during the blood purification process, the display screen 22 displays the pressure data detected by the pressure sensor 19 in real time, thereby feeding back the viscosity information of the blood in the pipeline body 1 in real time, so that the medical staff can grasp the blood viscosity. When the blood viscosity data in the pipeline body 1 rises to a certain value, the pressure applied by the left end of the movable plate 7 to the C-type clamp 14 also reaches a certain value, and the pressure sensor 19 transmits the detected pressure signal to the controller 20, and the controller 20 controls the alarm 21 to work, and the alarm 21 emits a buzzer to warn the medical staff to add heparin to the blood in time to reduce the blood viscosity, thereby minimizing the probability of blood clot formation.

[0044] When a blood clot has formed in the pipeline body 1, the blood clot flows with the blood to the filter 4 and is intercepted by the filter 4. At this time, some filter holes of the filter 4 are blocked by the blood clots, and the impact force on the filter 4 is further increased. The force imbalance of the movable plate 7 is further aggravated, and the pressure applied by the left end of the movable plate 7 to the C-type clamp 14 reaches a certain value. The pressure sensor 19 transmits the detected pressure signal to the controller 20, and the controller 20 controls the alarm 21 and the drive motor 15 to work. The alarm 21 emits a buzzer sound. At the same time, the drive motor 15 drives the screw 121 of the ball screw pair 12 to rotate clockwise, and the nut 122 of the ball screw pair 12 moves the C-type clamp 14 upward, thereby realizing the automatic upward movement of the movable plate 7, and then pulling the filter 4 and the blood clot on the filter 4 into the branch pipe 2. Figure 5 As shown, the anti-fall net 5 prevents blood clots from falling back into the pipeline body 1.

[0045] That is, this embodiment monitors the blood viscosity in the pipeline main body 1 in real time so that medical staff can add heparin in time to prevent the formation of blood clots to a certain extent; and after the blood clot is formed, the blood clot is intercepted by the filter 4 and automatically transferred to the branch 2 to prevent the blood purification pipeline from being blocked. In this embodiment, once the blood clot is intercepted by the filter 4, the drive motor 15 can be triggered to work, thereby transferring the blood clot to the branch 2. The blood clot is processed quickly, and no manual operation is required by medical staff, which reduces the workload of medical staff.

[0046] In addition, the mounting plate 13 in this embodiment is detachable, so the locking assembly can be reused, reducing the waste of medical materials and thus reducing medical costs.

[0047] Embodiment 3

[0048] The difference between this embodiment and the second embodiment is that: Figure 6 As shown, in this embodiment, a accommodating cavity 110 opposite to the branch pipe 2 is integrally formed on the pipeline main body 1, and the filter screen 4 extends into the accommodating cavity 110. There are two anti-falling nets 5 on the filter screen 4, and the two anti-falling nets 5 are distributed on the filter screen 4 along the axial direction of the branch pipe 2. The spacing between the two anti-falling nets 5 is the radial height of the pipeline main body 1.

[0049] In this embodiment, after the filter screen 4 located in the pipeline body 1 partially intercepts the blood clot, the controller 20 controls the driving motor 15 to work, and the driving motor 15 drives the screw 121 of the ball screw pair 12 to rotate clockwise, and the nut 122 of the ball screw pair 12 moves upward with the C-type clamp 14, so that the filter screen 4 brings the blood clot into the branch pipe 2; at the same time, the filter screen 4 located in the accommodating chamber 110 partially moves up into the pipeline body 1, as shown in FIG. Figure 7 In this way, if a blood clot is formed later, the blood clot can continue to be intercepted and transferred, thereby continuing to play an anti-blocking role.

[0050] Embodiment 4

[0051] The difference between this embodiment and the first embodiment, the second embodiment or the third embodiment is that: in this embodiment, a bellows is used instead of the soft film 8, and the bellows is made of medical silicone. In this embodiment, the bellows has a better anti-deformation ability in the radial direction than the soft film 8. When the soft film 8 is used, the volume change of the sealing cavity 9 is reflected in all directions. In this way, before the moving plate 7 moves up, the blood in the branch tube 2 will flow into and fill the sealing cavity 9 through the gap of the through hole I. The initial volume of the sealing cavity 9 is large, which may affect the operation of the locking assembly. When the bellows is used, the volume change of the sealing cavity 9 is mainly concentrated in the axial direction, and the change in the radial direction is very small, which will not affect the operation of the locking assembly.

[0052] The above are only embodiments of the present invention. The invention is not limited to the fields involved in this implementation case. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the present invention. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A blockage-resistant CRRT blood purification circuit, comprising a circuit body, characterized in that: The pipeline main body is connected with a branch pipe, and a fixed plate is provided at the end of the branch pipe away from the pipeline main body. A filter screen is provided in the pipeline main body, and an anti-fall net is provided on the filter screen. The filter screen is fixedly connected to a pull rod, and a through hole Ⅰ for the pull rod to pass through is provided on the fixed plate. The end of the pull rod away from the filter screen is fixedly connected to a movable plate, and a soft membrane is provided between the movable plate and the fixed plate, one end of the soft membrane is fixedly connected to the movable plate, and the other end of the soft membrane is fixedly connected to the fixed plate, and a sealed cavity is formed between the soft membrane, the movable plate and the fixed plate; a locking assembly for locking the movable plate is provided between the movable plate and the fixed plate, and after the locking assembly releases the lock on the movable plate, the movable plate can move relative to the fixed plate along the radial direction of the pipeline main body.

2. The anti-blocking CRRT blood purification circuit according to claim 1, characterized in that: The locking assembly includes a threaded limiting rod and a locking nut. The threaded limiting rod is fixedly connected to the movable plate. The locking nut is threadedly connected to the threaded limiting rod. A through hole II is provided on the fixed plate for the threaded limiting rod to pass through.

3. The anti-blocking CRRT blood purification circuit according to claim 1, characterized in that: The locking assembly includes a ball screw pair, a mounting plate and a C-type clamp. The mounting plate is perpendicular to the fixed plate. The screw of the ball screw pair is rotatably mounted on the mounting plate. The nut of the ball screw pair is vertically slidably mounted on the mounting plate. The C-type clamp is fixedly connected to the nut of the ball screw pair. The C-type clamp is used to clamp the movable plate.

4. The anti-blocking CRRT blood purification circuit according to claim 3, characterized in that: The through hole I is a strip-shaped hole. A pressure sensor is provided between the C-shaped clamp and the movable plate. The pressure sensor is electrically connected to a controller, and the controller is electrically connected to an alarm.

5. The anti-blocking CRRT blood purification circuit according to claim 4, characterized in that: The locking assembly further includes a drive motor for driving the screw of the ball screw pair to rotate. The drive motor is fixedly mounted on the mounting plate. The controller controls the operation of the drive motor according to the signal transmitted by the pressure sensor.

6. The anti-blocking CRRT blood purification circuit according to claim 4, characterized in that: The controller is electrically connected to a display screen, and the display screen is used to display pressure data detected by the pressure sensor.

7. The anti-blocking CRRT blood purification circuit according to claim 3, characterized in that: The mounting plate is detachably mounted on the fixing plate.

8. The anti-blocking CRRT blood purification circuit according to claim 7, characterized in that: The end of the mounting plate is provided with a mounting ear plate, and both the mounting ear plate and the fixing plate are provided with mounting holes.

9. The anti-blocking CRRT blood purification circuit according to claim 1, characterized in that: The pipeline body is provided with an accommodating cavity opposite to the branch pipe, the filter screen extends into the accommodating cavity, the number of anti-falling nets on the filter screen is more than two, and the more than two anti-falling nets are distributed on the filter screen along the axial direction of the branch pipe.

10. The anti-blocking CRRT blood purification circuit according to claim 9, characterized in that: There are two anti-falling nets, and the distance between the two anti-falling nets is the radial height of the pipeline body.

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